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mmc: mmci: stm32: define get_dctrl_cfg 

This patch defines get_dctrl_cfg callback for sdmmc variant.
sdmmc variant has specific stm32 transfer modes.
sdmmc data transfer mode selection could be:
-Block data transfer ending on block count.
-SDIO multibyte data transfer.
-MMC Stream data transfer (not used).
-Block data transfer ending with STOP_TRANSMISSION command.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ludovic Barre 2019-03-27 10:05:31 +01:00 committed by Ulf Hansson
parent 5db1e1fc7c
commit 8372f9d0ef
2 changed files with 23 additions and 0 deletions
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5
drivers/mmc/host/mmci.h
View File

@ -131,6 +131,11 @@
/* Control register extensions in the Qualcomm versions */
#define MCI_DPSM_QCOM_DATA_PEND BIT(17)
#define MCI_DPSM_QCOM_RX_DATA_PEND BIT(20)
/* Control register extensions in STM32 versions */
#define MCI_DPSM_STM32_MODE_BLOCK (0 << 2)
#define MCI_DPSM_STM32_MODE_SDIO (1 << 2)
#define MCI_DPSM_STM32_MODE_STREAM (2 << 2)
#define MCI_DPSM_STM32_MODE_BLOCK_STOP (3 << 2)
#define MMCIDATACNT 0x030
#define MMCISTATUS 0x034

18
drivers/mmc/host/mmci_stm32_sdmmc.c
View File

@ -265,10 +265,28 @@ static void mmci_sdmmc_set_pwrreg(struct mmci_host *host, unsigned int pwr)
}
}
static u32 sdmmc_get_dctrl_cfg(struct mmci_host *host)
{
u32 datactrl;
datactrl = mmci_dctrl_blksz(host);
if (host->mmc->card && mmc_card_sdio(host->mmc->card) &&
host->data->blocks == 1)
datactrl |= MCI_DPSM_STM32_MODE_SDIO;
else if (host->data->stop && !host->mrq->sbc)
datactrl |= MCI_DPSM_STM32_MODE_BLOCK_STOP;
else
datactrl |= MCI_DPSM_STM32_MODE_BLOCK;
return datactrl;
}
static struct mmci_host_ops sdmmc_variant_ops = {
.validate_data = sdmmc_idma_validate_data,
.prep_data = sdmmc_idma_prep_data,
.unprep_data = sdmmc_idma_unprep_data,
.get_datactrl_cfg = sdmmc_get_dctrl_cfg,
.dma_setup = sdmmc_idma_setup,
.dma_start = sdmmc_idma_start,
.dma_finalize = sdmmc_idma_finalize,